World Fish Migration Day is observed globally on May 21, focusing on the importance of migratory fish and free-flowing rivers. The event occurs every alternate year and aims to raise awareness about the ecological, economic, and cultural significance of migratory fish, which are vital for healthy river systems and the livelihoods of millions. Various organizations coordinate activities under the theme "Connecting Fish, Rivers, and People," encouraging public engagement in the protection of freshwater fish. Events include educational initiatives to inform people about the challenges faced by migratory fish, such as habitat loss due to dams that obstruct migration routes. The World Fish Migration Foundation is actively involved in mapping fish migration routes to aid conservation efforts. The celebration began in 2014 and has expanded to reach millions worldwide through various media.